These are 28mm scale miniatures designed by Sync Ratio Gaming systems.
They are big enough to require a 60mm Base, which is supplied. They would be suitable for games like Dungeons and Dragons, Age of sigmar and Pathfinder.
 
You are able to choose between 4 differerent versions of the Stun spider (Each comes with a 60mm base) or you can purchase all four in a bundle.